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【判断题】
子程序可以嵌套，嵌套深度最多为8层。( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【多选题】Which two statements about creating constraints are true?（）
A.
Constraint names must start with SYS_C
B.
All constraints must be defines at the column level.
C.
Constraints can be created after the table is created.
D.
Constraints can be created at the same time the table is created.
E.
Information about constraints is found in the VIEW_CONSTRAINTS dictionary view.
【多选题】Which two benefits are provided by creating VLANs?（）
A.
added security
B.
dedicated bandwidth
C.
provides segmentation
D.
allows switches to route traffic between subinterfaces
E.
contains collisions
【多选题】The blade has a groove on the bottom creating two distinct edges ——__________ and ___________.
A.
inside
B.
upside
C.
outside
D.
downside
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